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upx/src/bele_policy.h
Markus F.X.J. Oberhumer 996ca8d17d all: welcome 2025
2025-01-17 21:18:55 +01:00

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/* bele_policy.h -- access memory in BigEndian and LittleEndian byte order
This file is part of the UPX executable compressor.
Copyright (C) 1996-2025 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1996-2025 Laszlo Molnar
All Rights Reserved.
UPX and the UCL library are free software; you can redistribute them
and/or modify them under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING.
If not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Markus F.X.J. Oberhumer Laszlo Molnar
<markus@oberhumer.com> <ezerotven+github@gmail.com>
*/
// this is an internal include file private to bele.h
/*************************************************************************
//
**************************************************************************/
#if defined(BELE_CTP)
// CTP - Compile-Time Polymorphism (templates)
#define V static inline bele_constexpr
#define VV static forceinline_constexpr
#define S static int __acc_cdecl_qsort
#define C noexcept
#elif defined(BELE_RTP)
// RTP - Run-Time Polymorphism (virtual functions)
#define V virtual
#define VV virtual
#define S virtual int
#define C const noexcept
#else
#error
#endif
#if defined(BELE_RTP)
struct AbstractPolicy {
explicit inline AbstractPolicy() noexcept = default;
virtual inline ~AbstractPolicy() noexcept {}
V bool isBE() C = 0;
V bool isLE() C = 0;
V unsigned get16(const void *p) C = 0;
V unsigned get24(const void *p) C = 0;
V unsigned get32(const void *p) C = 0;
V upx_uint64_t get64(const void *p) C = 0;
V void set16(void *p, unsigned v) C = 0;
V void set24(void *p, unsigned v) C = 0;
V void set32(void *p, unsigned v) C = 0;
V void set64(void *p, upx_uint64_t v) C = 0;
V int get16_signed(const void *p) C = 0;
V int get24_signed(const void *p) C = 0;
V int get32_signed(const void *p) C = 0;
V upx_int64_t get64_signed(const void *p) C = 0;
S u16_compare(const void *a, const void *b) C = 0;
S u24_compare(const void *a, const void *b) C = 0;
S u32_compare(const void *a, const void *b) C = 0;
S u64_compare(const void *a, const void *b) C = 0;
S u16_compare_signed(const void *a, const void *b) C = 0;
S u24_compare_signed(const void *a, const void *b) C = 0;
S u32_compare_signed(const void *a, const void *b) C = 0;
S u64_compare_signed(const void *a, const void *b) C = 0;
private:
// disable copy and move
UPX_CXX_DISABLE_COPY_MOVE(AbstractPolicy)
// disable dynamic allocation
UPX_CXX_DISABLE_NEW_DELETE(AbstractPolicy)
};
#endif
#if defined(BELE_RTP)
#undef C
#define C const noexcept override
#endif
struct BEPolicy final
#if defined(BELE_RTP)
: public AbstractPolicy
#endif
{
explicit inline BEPolicy() noexcept = default;
#if defined(BELE_CTP)
typedef N_BELE_RTP::BEPolicy RTP_Policy;
#elif defined(BELE_RTP)
typedef N_BELE_CTP::BEPolicy CTP_Policy;
#endif
VV bool isBE() C { return true; }
VV bool isLE() C { return false; }
typedef BE16 U16;
typedef BE32 U32;
typedef BE64 U64;
V unsigned get16(const void *p) C { return get_be16(p); }
V unsigned get24(const void *p) C { return get_be24(p); }
V unsigned get32(const void *p) C { return get_be32(p); }
V upx_uint64_t get64(const void *p) C { return get_be64(p); }
V void set16(void *p, unsigned v) C { set_be16(p, v); }
V void set24(void *p, unsigned v) C { set_be24(p, v); }
V void set32(void *p, unsigned v) C { set_be32(p, v); }
V void set64(void *p, upx_uint64_t v) C { set_be64(p, v); }
V int get16_signed(const void *p) C { return get_be16_signed(p); }
V int get24_signed(const void *p) C { return get_be24_signed(p); }
V int get32_signed(const void *p) C { return get_be32_signed(p); }
V upx_int64_t get64_signed(const void *p) C { return get_be64_signed(p); }
S u16_compare(const void *a, const void *b) C { return be16_compare(a, b); }
S u24_compare(const void *a, const void *b) C { return be24_compare(a, b); }
S u32_compare(const void *a, const void *b) C { return be32_compare(a, b); }
S u64_compare(const void *a, const void *b) C { return be64_compare(a, b); }
S u16_compare_signed(const void *a, const void *b) C { return be16_compare_signed(a, b); }
S u24_compare_signed(const void *a, const void *b) C { return be24_compare_signed(a, b); }
S u32_compare_signed(const void *a, const void *b) C { return be32_compare_signed(a, b); }
S u64_compare_signed(const void *a, const void *b) C { return be64_compare_signed(a, b); }
static void compileTimeAssertions() {
COMPILE_TIME_ASSERT(sizeof(U16) == 2)
COMPILE_TIME_ASSERT(sizeof(U32) == 4)
COMPILE_TIME_ASSERT(sizeof(U64) == 8)
COMPILE_TIME_ASSERT_ALIGNED1(U16)
COMPILE_TIME_ASSERT_ALIGNED1(U32)
COMPILE_TIME_ASSERT_ALIGNED1(U64)
}
private:
// disable copy and move
UPX_CXX_DISABLE_COPY_MOVE(BEPolicy)
// disable dynamic allocation
UPX_CXX_DISABLE_NEW_DELETE(BEPolicy)
};
struct LEPolicy final
#if defined(BELE_RTP)
: public AbstractPolicy
#endif
{
explicit inline LEPolicy() noexcept = default;
#if defined(BELE_CTP)
typedef N_BELE_RTP::LEPolicy RTP_Policy;
#elif defined(BELE_RTP)
typedef N_BELE_CTP::LEPolicy CTP_Policy;
#endif
VV bool isBE() C { return false; }
VV bool isLE() C { return true; }
typedef LE16 U16;
typedef LE32 U32;
typedef LE64 U64;
V unsigned get16(const void *p) C { return get_le16(p); }
V unsigned get24(const void *p) C { return get_le24(p); }
V unsigned get32(const void *p) C { return get_le32(p); }
V upx_uint64_t get64(const void *p) C { return get_le64(p); }
V void set16(void *p, unsigned v) C { set_le16(p, v); }
V void set24(void *p, unsigned v) C { set_le24(p, v); }
V void set32(void *p, unsigned v) C { set_le32(p, v); }
V void set64(void *p, upx_uint64_t v) C { set_le64(p, v); }
V int get16_signed(const void *p) C { return get_le16_signed(p); }
V int get24_signed(const void *p) C { return get_le24_signed(p); }
V int get32_signed(const void *p) C { return get_le32_signed(p); }
V upx_int64_t get64_signed(const void *p) C { return get_le64_signed(p); }
S u16_compare(const void *a, const void *b) C { return le16_compare(a, b); }
S u24_compare(const void *a, const void *b) C { return le24_compare(a, b); }
S u32_compare(const void *a, const void *b) C { return le32_compare(a, b); }
S u64_compare(const void *a, const void *b) C { return le64_compare(a, b); }
S u16_compare_signed(const void *a, const void *b) C { return le16_compare_signed(a, b); }
S u24_compare_signed(const void *a, const void *b) C { return le24_compare_signed(a, b); }
S u32_compare_signed(const void *a, const void *b) C { return le32_compare_signed(a, b); }
S u64_compare_signed(const void *a, const void *b) C { return le64_compare_signed(a, b); }
static void compileTimeAssertions() {
COMPILE_TIME_ASSERT(sizeof(U16) == 2)
COMPILE_TIME_ASSERT(sizeof(U32) == 4)
COMPILE_TIME_ASSERT(sizeof(U64) == 8)
COMPILE_TIME_ASSERT_ALIGNED1(U16)
COMPILE_TIME_ASSERT_ALIGNED1(U32)
COMPILE_TIME_ASSERT_ALIGNED1(U64)
}
private:
// disable copy and move
UPX_CXX_DISABLE_COPY_MOVE(LEPolicy)
// disable dynamic allocation
UPX_CXX_DISABLE_NEW_DELETE(LEPolicy)
};
// Native Endianness policy (aka host policy)
#if (ACC_ABI_BIG_ENDIAN)
typedef BEPolicy NEPolicy;
typedef BEPolicy HostPolicy;
#elif (ACC_ABI_LITTLE_ENDIAN)
typedef LEPolicy NEPolicy;
typedef LEPolicy HostPolicy;
#else
#error "ACC_ABI_ENDIAN"
#endif
#undef V
#undef VV
#undef S
#undef C
/* vim:set ts=4 sw=4 et: */
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